scholarly journals Relationship of Physical Properties of Limestone and Marble with Rock Strength Under Specific Geological Conditions from Khyber Region Hunza

2020 ◽  
Vol 10 (4) ◽  
pp. 14-18
Author(s):  
Naeem Abbas ◽  
Javed Qureshi Akhter ◽  
Garee Khan ◽  
Muhammad Alam ◽  
Hawas Khan ◽  
...  
Keyword(s):  
Specific Gravity ◽  
Physical Properties ◽  
Rock Strength ◽  
Slake Durability Index ◽  
N Value ◽  
Slake Durability ◽  
Geological Conditions ◽  
Durability Index ◽  
Rebound Number ◽  
Relationship Of

The uniaxial compressive strength (UCS) is one of the input parameters mostly used in surface andunderground designs. A literature review revealed that most of the empirical equations between UCS and Schmidthammer rebound number (N) are not satisfactory because of the low coefficient of correlation. In most of the cases, asingle formula is used for all types of rocks. In this study, a relationship UCS with N, slake durability, moisture content,and specific gravity has been developed for a particular limestone and marble deposit. These equations help todetermine the strength of these deposits directly using N value and other properties. The UCS value increased withincreasing N value, specific gravity, and slake durability. While the UCS value decreased with increasing moisturecontent. A relation between slaking cycles and slake durability index is also developed. In this study, the slakedurability value decreased with increasing slaking cycles for both limestone and marble. The UCS showed a linearrelationship with these physical properties.

scholarly journals Relationship of Physical Properties of Limestone and Marble with Rock Strength Under Specific Geological Conditions from Khyber Region Hunza

2020 ◽  
Vol 10 (4) ◽  
pp. 14-18
Author(s):  
Naeem Abbas ◽  
Javed Qureshi Akhter ◽  
Garee Khan ◽  
Muhammad Alam ◽  
Hawas Khan ◽  
...  
Keyword(s):  
Specific Gravity ◽  
Physical Properties ◽  
Rock Strength ◽  
Slake Durability Index ◽  
N Value ◽  
Slake Durability ◽  
Geological Conditions ◽  
Durability Index ◽  
Rebound Number ◽  
Relationship Of

The uniaxial compressive strength (UCS) is one of the input parameters mostly used in surface andunderground designs. A literature review revealed that most of the empirical equations between UCS and Schmidthammer rebound number (N) are not satisfactory because of the low coefficient of correlation. In most of the cases, asingle formula is used for all types of rocks. In this study, a relationship UCS with N, slake durability, moisture content,and specific gravity has been developed for a particular limestone and marble deposit. These equations help todetermine the strength of these deposits directly using N value and other properties. The UCS value increased withincreasing N value, specific gravity, and slake durability. While the UCS value decreased with increasing moisturecontent. A relation between slaking cycles and slake durability index is also developed. In this study, the slakedurability value decreased with increasing slaking cycles for both limestone and marble. The UCS showed a linearrelationship with these physical properties.

Effects of Laumontite Hydration/Dehydration on Swelling Deformation and Slake Durability of Altered Granodiorite

2020 ◽  
Vol 26 (4) ◽  
pp. 507-516
Author(s):  
Junsong Yan ◽  
Junhui Shen ◽  
Kaizhen Zhang ◽  
Jianjun Xu ◽  
Weifeng Duan ◽  
...  
Keyword(s):  
Axial Strain ◽  
Test Results ◽  
X Ray Diffraction ◽  
Dam Foundation ◽  
Hydro Power ◽  
Slake Durability Index ◽  
Slake Durability ◽  
Dehydration Reactions ◽  
Short Period ◽  
Durability Index

ABSTRACT The mineral laumontite can undergo hydration/dehydration reactions at room temperature. The hydration/dehydration produces a 3 to 6 percent volume change in the unit cell. The effects of laumontite hydration/dehydration on swelling and slake durability were investigated using altered granodiorite containing laumontite from the dam foundation of Yangfanggou Hydro Power Station, Sichuan, China. The occurrence of laumontite in altered rocks was first determined by petrological analysis. Typical samples were then collected for laboratory X-ray diffraction (XRD) analyses, free swelling tests, and slake durability index (SDI) tests. The test results were analyzed to determine the quantitative relationships between laumontite content, maximum axial strain, and slake durability index. We found that hydration of laumontite led to rock swelling. As laumontite content increased, maximum axial strain increased linearly; if water penetrated the rock quickly, swelling occurred over a short period. The hydration/dehydration of laumontite decreased slake durability of the rock; the SDI decreased approximately linearly as laumontite content increased.

Determination of Slake Durability Index with Spherical Samples

2013 ◽  
Vol 548 ◽  
pp. 247-252 ◽  
Author(s):  
Hüseyin Ankara ◽  
Mehmet Aksoy ◽  
Suheyla Yerel ◽  
Yasar Keser
Keyword(s):  
Sample Preparation ◽  
Preparation Method ◽  
Index Test ◽  
Test Results ◽  
Sample Preparation Method ◽  
Slake Durability Index ◽  
Slake Durability ◽  
Durability Index ◽  
Preparation Stage

In this study, the preparation method of the equivalent sized spherical samples which is called as Pasha Method is applied to slake durability index test. In order to apply this sample preparation method, white and pink tuff samples were collected at the tuff quarries located at the Eskisehir region in Turkey. After sample preparation stage, these tuff samples were subjected to the Slake Durability Index test in the laboratory. According to the test results presented in this paper, the highest slake durability index values were obtained from equal-sized spherical test samples that are prepared according to the new method, Pasha Method, when compared to the other two types of samples.

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